INSPIRE INSpiring Pressure gain combustion Integration, Research, and Education

ESR 11

Introduction and contact info:

Name: Umberto Sandri

Work address: THT Lab – Via V. Emanuele 32, 50041 Calenzano – Firenze


PhD project:

Title: Experimental study of cooling solutions for PGC concepts

Short description: The combustion process occurring in PGC of CVC and RDC combustors induces heat loads which are critical for a structural stability of the combustor liners. This determines the necessity for active cooling solutions. The increase of pressure inside the combustor, objective of the PGC solutions, will prevent the chance to adopt the common film cooling concepts used in standard gas turbines. Film cooling is normally created by the injection of cold air provided by compressor discharge with the aim of creating a layer (film) of cold fluid along the combustor hot surface to protect against the hot gas: the negative pressure drop between cold air and hot gas prevents the use of this cooling strategy. Cooling schemes for PGC combustors must therefore be based on concepts exploiting forced convection processes on the cold side of combustor liners. The present project is closely connected to the project of ESR10. The two ESRs will select and design a set of cooling methods which must be suitable to be implemented in PGC combustors, considering as reference configurations the RDC engine available at TU Berlin and the CVC test rig installed at ENSMA. The design space available for possible cooling solutions will be extended by the use of additive manufacturing allowing to consider complex innovative geometries.  ESR10 will do a numerical investigation of the performance while the present project will build low TRL test rigs, properly scaled using similitude consideration,  capable of assessing the performances of the different cooling strategies selected. The thermal loads to be removed are obtained from experimental and CFD results previously produced by other ESRs involved in the investigations of TU Berlin and ENSMA test rigs. This first stage will support the corresponding CFD results and select the most promising configuration. After this stage, experiments will be repeated for the selected cooling method in its optimized configuration as predicted by the CFD results. This test rig will allow a characterization of the thermal performance of representative cooled parts and of the overall effectiveness of the cooling method.

Supervisors:  Prof. Bruno Facchini, Prof. Antonio Andreini, Dr. Alessio Picchi

Mentor: Prof Myles Bohon

Planned secondments:

  • Berlin Institute of Technology: 3 Months
  • ISAE ENSMA, Poitiers: 2 Months


Bachelor's studies: Aerospace Engineering, Politecnico di Milano

Exchange program: 1 Semester, Universidad Pontificia Bolivariana (UPB), Medellin, Colombia

Master's studies: Mechanical Engineering, Thermal and Fluid Engineering, University of Twente, Enschede, Netherlands

Internship: ONERA, The French aerospace Lab, Toulouse, France

Thesis: Thermoelectric waste heat recovery in hybrid electric aircraft, University of Twente, Enschede, Netherlands

Personal interests:


Gas Turbines, Heat Transfer, Cooling Strategies, Experimental Techniques, Combustion.

Research highlights:

The PhD starts the 1st of November. This Section will be regularly updated every 6 months.

ESR1 – Choomanee Runnoo: Experimental investigation of Constant Volume Combustion and its reduced order model – ENSMA (FR), Supervisors: Prof. Marc Bellenoue and Bastien Boust
ESR2 Gregory Uhl: Numerical analysis of the interaction between a Rotating Detonation Combustor and an axial turbine – SAFRAN Tech (FR), Dr. Said Taileb, Prof. Marc Bellenoue, Prof. Thierry Poinsot,
ESR3 Nicola Detomaso: Simulation of CVC combustor – CERFACS (FR), Supervisors: Prof. Thierry Poinsot, , Dr. Davide Laera, Dr. Florent Duchaine
ESR4 Maria Clara de Jesus Vieira: Experimental characterization of ignition events in CVC like conditions – ENSMA (FR), Supervisors: Prof. Julien Sotton, Prof. Marc Bellenoue and Prof. Camille Strozzi
ESR5 Provence Barnouin: Control and impact of RDC wave direction – TUB (DE), Supervisors: Prof. Myles Bohon and Prof. Christian O. Paschereit
ESR6 – Patrick Strempfl: LES of flow and combustion in a rotating detonation engine coupled to a turbine – CERFACS (FR), Supervisor: Prof. Thierry Poinsot
ESR7 – Hongyi Wei: Experimental investigation of rotating detonation combustors including ignition processes and turbine-integration effects – TUB (DE), Supervisors: Prof. Myles Bohon and Prof. Christian O. Paschereit
ESR8Thomas Golliard: Computational aeroacoustics of the exhaust flow for noise assessment and control – KTH (SE), Supervisors: Prof. Mihai Mihaescu, Prof. Anders Dahlkild
ESR9 – Roseline Ngozi Ezekwesili: Deflagration-Autoignition-Detonation transition – TUB (DE), Supervisor: Prof. Myles Bohon and Prof. Marc Bellenoue
ESR10 – Shreyas Ramanagar Sridhara: Numerical modelling and optimization of cooling solutions for PGC concepts – UNIFI (IT), Supervisors: Prof. Antonio Andreini
ESR11- Umberto Sandri: Experimental study of cooling solutions for PGC concepts – UNIFI (IT), Supervisor: Prof. Bruno Facchini, Prof. Antonio Andreini, Dr. Alessio Picchi
ESR12 – Panagiotis Gallis: Unsteady numerical simulation of the interaction between pressure-gain combustors and high-pressure turbine stages – POLITO (IT), Supervisor: Dr. Simone Salvadori
ESR13 – Abhishek Dubey: power plant analysis and cycle thermo-economic optimization – UNIGE (IT), Supervisor: Prof. Alessandro Sorce
ESR14 – Sreenath Purushothaman: propulsion application with part load and dynamic analysis – UNIGE (IT), Supervisors: Prof. Alessandro Sorce, Prof. Alberto Traverso
ESR15 – Gokkul Raj Varatharajulu Purgunan: Full gas dynamic and exergetic analysis of PGC cycles with rotating detonations – TUB (DE), Supervisor: Prof. Panagiotis Stathopoulos